Jupiter. The temperature on Jupiter is -185.5 degree F.

Payload. "Useful load fraction" is the combined weight of the payload and the fuel.

Arm. Roots help provide support by anchoring the plant and absorbing water and nutrients needed for growth.

Perrier. Perrier is owned by the Nestle Corporation.

Sputnik. Sputnik was launched by the Soviet Union on October 4, 1957.

Homo Floresiensis. Homo floresiensis, discovered on the island of Flores in Indonesia, may have been less than four feet at adulthood.